I will have to look into blue light therapy. I used to have psoriasis really bad on my scalp. This might sound gross to some people but what cured it for me was to not use shampoo & conditioner every day in the shower. I still wash well with warm water but ever since I stopped using "products" in my hair every day, I have not had an issue with scalp psoriasis in over 15 years. I will take naturally oily hair over scalp psoriasis any day.